KACTUS AL7075 Floating Disc Brake 140/160mm UCI Approve Ultra-light Road/MTB E-Bike Stainless 6 Bolts/Center Lock Hollowed Rotor KACTUS AL7075 Floating Disc Brake 140/160mm UCI Approve Ultra-light Road/MTB E-Bike Stainless 6 Bolts/Center Lock Hollowed Rotor. Sale price : $21.50 Category : Sports & Entertainment